Steam-boiler.



No. 667,948. Patented Feb. I2, l90l. D. G. GRANT.

STEAM BOILER.

(Applicationfiled Sept. 11, 1900.)

(No Model.) 4 Sheats-$heet l.

WITNESSES my jqTo 3 gxiw W 4 2 dM V.

ATTORNEY" m2 NORRIS Pzrzns 10. vncrouma, WASHULBYON, n c.

No. 667,940. Patented Feb. l2, l90l. D. G. GRANT.

STEAM BOILER.

[Application filed Sept. 11, 1900.)

(No Model.)

WITNESSES:

BJML ATTORNEY n. e; GRANT.

STEAM BOILER.

(Application filed Sept. 11, 1900.) (Ho Nuclei.)

Patanted'Feb. I2, l90l.

4 Shaets-8heot 3.

272 13 WITNESSES: INVE-NTOR S. g. 4414 0026 4 6M2? ATTORNEY N0. M7340. Patented Fob. I2, I90l.

D. G. GRANT.

STEAM BOILER. (Application filed Sept. 11, 1900.) (No Model.) 4 Sheets-fishnet 4.

m .1 1 I I WITNESSES: INVENTOR 3. 5 k AMT/4&5 5M. @XMAL 51 ATTORNEY ilhvrrnn mares Ami-rum treat DAVID G. GRANT, OF SYRACUSE, NEW YORK, ASSIGNOR OF ONE-HALF TO JAMES J. KAVANAGH, OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 667,9d0, dated February 12, 1901. Application filed September 11, 1900. Serial No, 29,692. (No model.)

T (0 whom it may concern: in an enlarged extension of the front end of Beit known that 1, DAVID G. GRANT, acitithe boiler-shell B and in such position in rezen of the United States, andaresident of Syrlation to the water-space of the boiler as to acuse, in the county of Onondaga, in the State form a water-jacket 6 around the said comof New York, have invented new and useful bustion-chamber. Said Water-jacket com- Improvements in Steam-Boilers, of which the municating directly with the water-space of following, taken in connection with the acthe boiler causes the Water in the boiler to companying drawings, is a full, clear, and exabsorb the heat from the combustion-chamact description. ber. Across the interior of said combustion- 10 The main and primary object of this invenchamber is extended a floor (Z, formed of wation is to equip steam-boilers with efficient, tor-tubes, which are securely fastened at reliable, and properlycontrollable means for each end to the vertical walls of the combusconsuming the smoke, gases, cinders, and fine tion-chamber and communicate with the waparticles of fuel escaping from the fire-box ter-jacket b, so as to cause the Water to cir- 15 or furnace of the boiler and in consuming culate through said tubes, and thus protect said products of combustion and hithertothem from injury by the heat they are subwasted fuel produce an intense heat applied jected to. In order to prevent accumulation to the boiler in such a manner as to greatly of sediment in said tubes, I incline them, increase the efficiency of the boiler and mapreferably, alternatelyin opposite directions, 2o terially economizein theconsumption of fuel; as more clearly shown in Fig. 2 of the draw and the object also is to guard against injury ings. Said tubes are placed suitable disto the structure of the boiler by the aforesaid tances apart to allow the products of comintense heat; and to these ends the invention bustion to pass up between the tubes. This consists in the novel construction and comfloor cl is arranged in the lower portion of the 25 bination of the component parts of a comcombustion-chamber, preferably in a plane bustion-chamber and its connection to the about in range with the bottom of the boiler l boiler, as hereinafter described, and set forth proper or at a suitable distance above the i in the claims. bottom of the combustion-chamber to form 1 In the accompanying drawings, Figure 1 is an air-chamber D under said floor. Upon 30 a vertical longitudinal section of a steamthe end of the floor d, adjacent to the ends boiler embodying my invention. Fig. 2 is of the lines a, is mounted a baffle-wall e, an enlarged vertical transverse section on which may be either formed of fire-brick, as line X X in Fig. 1. Fig. 3 is a side View of shown, or consist of a metal chamber charged that portion of the boiler to which my invenwith Water from the water-space of the boiler. 35 tion is applied; and Fig. 4 is an inverted Upon the remainder of the floor cl, from the plan view of the same, illustrating one of the baffle-wall a forward, is built a reticular fire means for regulating the dampers or valves brick bodyf, constructed in such a manner of the air-induction ports. as to form sinuous or tortuous firepassages Similar letters of reference indicate correthrough said body, for the purpose herein- 0 4o spending part-s. after explained.

A represents the fire-box or main furnace The bottom of the combustion-chamber is of a locomotive-boiler. provided with suitable air-induction ports h a a denote the fines extending from the hand with adj nstable valves or dampers h h fire-box, and 0 represents my improved comfor regulating the ingress of air to the com- 5 5 bustion-chamber, which is disposed to receive bustion-chamber. Said ports are preferably the products of combustion from the aforearranged in parallel longitudinal rows to alsaid fines. Hy invention consists in the follow the dampers of each row to be united lowing construction and combination of the and the entire set of dampers to be adjusted component parts of said combustion chamsimultaneously by means of suitable levers I00 50 her and its connection with the boiler. The pivoted to the under side of the boiler exshell of said combustion-chamber is arranged tension and engaging the rows of dampers,

as shown in Fig. 4 of the drawings. The levers g are coupled to a rod g, which is extended to the cab of the engine in any suitable manner to allow the engineer or fireman to manipulate said rod, so as to regulate the dampers as maybe necessary to permit the required amount of air to enter into the combustion-chamber.

I represents the smoke-stack, which extends from the top of the combustion-chamber, and Marc the exhaust-pipes, which lead to the smoke-stack. Inasmuch as said exhaust-pipes extend through the fire-brick body f, which becomes intensely heated, as hereinafter described, I envelop said pipes in water-jackets j, as shown in Fig. 2 of the drawings. The exhaust-pipest'i are tapered to their discharge ends, and inside of said ends are variable exhaust-valves i, which may be formed of enlargements of the ends of rods 7", extending longitudinally through the exhaustpipes and through suitable stuffing-boxes is on the outer portions of said pipes. The outer protruding ends of said rods are connected to suitable levers I, attached to rods Z, which are extended to the cab for manipulation by the engineer or fireman, who is thus enabled to move the exhaust-valves toward and from the discharge-nozzles of the exhaust-pipes. Said movement of the valves in the tapering pipes reduces or enlarges the areas of the exhaust and increases or diminishes correspondingly the draft through the fire-fines a a. This variation of the exhaust is especially essential in the use of my present invention, inasmuch as it controls the intensity of the heat permeating the fire-brick body f, which transmits said heat to the water-jacket b, surrounding the combustionchamber. Said jacket communicating directly with the water-space of the boiler causes the water throughout the boiler to partake of the heat generated in the combustion-chamber O, and thus the efficiency of the boiler is very materially augmented. To further utilize said heat,'I mount upon the boiler directly over the combustion-chamber O a steam-dome J and extend the smokestack I through said dome, so as to subject the steam to the heat of the stack. In this dome I prefer to place the usual throttle- -valve if, from which the steam is conducted by the pipes 25 to the steam-chest O of the engine-cylinders P in the usual manner. The main portion of the steam-pipes 25 may be arranged either atthe exteriors of the dome and combustion-chamber, as shown, or within said dome and upper portion of the boilershell extension.

12. in Fig. 1 of the drawings represents the usual blower-pipe of the air-pump of the 10- comotive.

u and u denote manholes for affording access to the interior of the combustion-chamber when required for making repairs therein, and '0 represents the removable covers for said manholes. Said covers are lined with fire-brick on their inner sides to protect them from the fire in the combustion-chamber.

The operation of my described invention is as follows: After the fire has been fairly started in the fire-box by the draft produced by the action of the 'blowpipe a said draft causes the smoke and gases to pass from the fiues a through the fire-brick bodyfto the smoke-stack I. The circulation of the said smoke and gases through said body f causes the latter to become heated. Then by opening the throttle-valve t the engine is set in motion,and the exhaust-steam passes from the cylinders P through the exhaust-pipes i, and by opening the valves or dampers h to a proper degree the necessary air is admitted to the interior of the combustion-chamber to mingle with the smoke and gases therein and supply the necessary oxygen to produce combustion of said gases, which combustion is promoted by the heat emitted from the firebrick bodyf. This combustion consumes all the products of combustion and produces a very intense heat in the combustion-chamber. This heat is controlled by regulating the variable-exhaust valves 1'', so as to increase the capacity of the discharge-nozzles of the exhaust pipes t', and thus reduce the draft through the flues of the boiler and by a corresponding adjustment of the valves of the air-induction ports h. The aforesaid intense heat in the combustion-chamber is absorbed by the water in the boiler, and thus greatly enhances the efiiciency of the boiler and cffects a reat savin in the consum tion of b I:

fuel.

What I claim is- 1. The combination with ahorizontal boiler, flues extending longitudinally through said boiler, and the fire-box communicating with said flues at one end of the boiler, of a combustion-chamber formed on the opposite end of the boiler and disposed to receive the products of combustion from the dues, a reticular fire-brick body disposed in said combustionchamber to be permeated by the products of combustion, and a water-jacket surrounding the combustion-chamber and communicating with the Water-space of the boiler to absorb the heat from the combustion-chamber by the water in the boiler, as set forth.

2. In asteam-boiler, the combination with the fire-box and fines extending therefrom, of a combustion-chamber disposed to receive the products of combustion from said lines, a water jacket surrounding said combustionchamber and communicating with the waterspace of the boiler, a reticular fire brick body disposed in the combustionchamber to be permeated by the products of combustion, air-induction ports communicating with the interior of the combustion-chamber, and dampers adjustably supported to open and close the ports, and means for regulating said dampers operatively arranged for the person in charge as set forth.

3. In a steam-boiler, the combination with the fire-box and fines extending therefrom, of a combustion-chainber disposed to receive the products of combustion from said fines, a baffle-Wall in the combustion-chamber adjacent to the fines, a water-jacket surrounding said chamber and communicating with the Water-space of the boiler,a reticular fire-brick body disposed in the combnstion-chamber, and aininduction ports communicating With the interior of said chamber to promote combustion as set forth.

i. In a locomotive-boiler the combination "with the lire-box and fines extending there from, of a combustion-chamber disposed to receive the products of combustion from said fines, the smoke-stack extending from said combustion-chamber, the exhaust-pipes lead ing to said smoke-stack, a Water-jacket surrounding the combustion-chamber and communicating With the Water-space of the boiler, a reticular fire-brick body disposed in the combustion-chamber to be permeated and heated by the products of combustion, and air-induction ports communicating with the interior of the combustion-chainber to promote combustion therein as set forth.

5. In a steam-boiler the combination with the fire-box and lines extending therefrom, of a combustion-chamber disposed to receive the products of combustion from the fines, a Water jacket surrounding said combustionchamber, water-tubes extending across said chamber, a reticular fire-brick body over said tubes, and air induction ports in the combustion-chamber beneath the Water-tubes as set forth.

6. In a locomotive-boiler the combination With the fire-box and lines extending therefrom, of a combustion-chainber formed in the front end of the boiler With a Water-jacket surrounding it, water-tubes extending across the combnstionchamber in a plane approximately in line with the bottom of the boiler proper and forming an air-chamber in the base of the combustion-chamber, a reticular fire-brick body directly over the Water-tubes, and air-induction ports through the bottom of the aforesailll air-chamber as set forth.

'7. In a locomotive-boiler the combination With the fire-box and lines extending therefrom, of a combustion-chamber formed in the front end of the boiler with a water-jacket surrounding it, the smoke-stack extending from said combustion-chamber, the exhaust-pipes leading to said stack, a baffle-Wall interposed between the aforesaid fines and exhaust-pipes, water-tubes extending across the combustionchamber, a reticular fire-brick body directly over said tubes, and air-induction ports communicating with the combustion-chamber beneath the water-tubes as set forth.

8. In a horizontal-flue boiler, the combination with the fire-box and lines extending therefrom, of a Water-jacketed combustionchamber disposed to receive the products of combustion from said fines, Water-tubes extending across the lower portion of said com bustion-chamber and inclined alternately in opposite directions,a reticular fire-brick body seated upon said tubes, and air-induction ports in the bottom of said combustion'chamher as set forth.

9. In a horizontal-flue boiler the combination with the lire-box and fines extending therefrom, of a combustion-chamber disposed to receive the products of combustion from said lines, a water-jacket surrounding said combnstion-chamber and communicating with the Water-space of the boiler, a floor of Water-tubes extending across said chamber, a baffle-wall mounted on said floor adjacent to the lines, a reticular fire-brick body built upon the aforesaid floor, and air-induction ports in the bottom of the combustion-chamber as set forth and shown.

10. A locomotive-boiler having a combustion-chamber formed in the front end thereof, the exhaust-pipes formed with Water-jackets around them, a floor of water-tubes extending across the combustion-chamber, a bafflewall mounted on said floor adjacent to the lire-Flues of the boiler, a reticular fire-brick body built upon the aforesaid floor, and airinduction ports in the bottom of the combustion-chamber as set forth and shown.

11. A locomotive-boiler formed With a com bustion-chamberin its frontend, the exhaustpipes formed With Water-jackets around them, a floor formed of Water-pipes inclined alternately in opposite directions and extending across the combustion-chamber above the bottom thereof to form an air-chamber beneath said floor, a baffle-Wall mounted on said floor adjacent to the fire-fines, areticular firebritk body built upon the aforesaid floor, and air-induction ports in the bottom of the combustion-chamber as set forth.

12. A locomotive-boiler formed With a combustion-chamber in its front end, the exhaustpipes formed with Water-jackets around them, variable-exhaust valves in said pipes provided Wit b means for control by the person in charge, a floor of water-tubes extending across the combustion-chamber beneath the exhaustpipes, a baffle-Wall mounted on said floor adjacent to the [ire-fines, a reticular fire-brick body built upon said floor, and air-induction ports in the bottom of the combustion-chamher as and for the purpose set forth.

18. A locomotive-boiler formed With a combUSLlOTl'CllZLHlbBI' in its front end, a steamdome upon the boiler over the combustionchamber, the smokestack extending from the said chamber through the steam-dome, the exhaust pipes formed with Water jackets around them, a reticular fire-brick body disposed in the combustion-chamber to be permeated and heated by the products of conr bustion, and air-induction ports in the bottom of the combustion-chamber to promote combustion in said chamber substantially as set forth.

14. A locomotiveboiler formed with acombustion-chamber in its front end, a steam- IIO dome upon the boiler over said chamber, the nets of combustion, and air-induction ports smoke-stack extending from the combustionin the bottom of the combustion-chamber and r0 chamber through the aforesaid dome, the exprovided with adjustable dampers under oonhaust-pipes formed with Water-jackets around trol of the engineer as set forth.

5 them, variable-exhaust valves in said pipes DAVID G. GRANT. [L. 8.]

under control of the engineer, a reticular fire- In presence of V brick body disposed in the combustion-chani- J. J. LAASS,

ber to be permeated and heated by the prod- H. B. SMITH; 

